/*
 * jQuery Input Limiter plugin 1.3.1
 * http://rustyjeans.com/jquery-plugins/input-limiter/
 *
 * Copyright (c) 2009 Russel Fones <russel@rustyjeans.com>
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

(function ($) {
    $.fn.inputlimiter = function (options) {
        var opts = $.extend({}, $.fn.inputlimiter.defaults, options),
            $elements = $(this);
        if (opts.boxAttach && !$('#' + opts.boxId).length) {
            $('<div/>').appendTo("body").attr({
                id: opts.boxId,
                'class': opts.boxClass
            }).css({'position': 'absolute'}).hide();
            // apply bgiframe if available
            if ($.fn.bgiframe) {
                $('#' + opts.boxId).bgiframe();
            }
        }

        var inputlimiterKeyup = function (e) {
                var $this = $(this),
                    count = counter($this.val());
                if (!opts.allowExceed && count > opts.limit) {
                    $this.val(truncater($this.val()));
                }
                if (opts.boxAttach) {
                    $('#' + opts.boxId).css({
                        'width': $this.outerWidth() - ($('#' + opts.boxId).outerWidth() - $('#' + opts.boxId).width()) + 'px',
                        'left': $this.offset().left + 'px',
                        'top': ($this.offset().top + $this.outerHeight()) - 1 + 'px',
                        'z-index': 2000
                    });
                }
                var charsRemaining = (opts.limit - count > 0 ? opts.limit - count : 0),
                    remText = opts.remTextFilter(opts, charsRemaining),
                    limitText = opts.limitTextFilter(opts);

                if (opts.limitTextShow) {
                    $('#' + opts.boxId).html(remText + ' ' + limitText);
                    // Check to see if the text is wrapping in the box
                    // If it is lets break it between the remaining test and the limit test
                    var textWidth = $("<span/>").appendTo("body").attr({
                        id: '19cc9195583bfae1fad88e19d443be7a',
                        'class': opts.boxClass
                    }).html(remText + ' ' + limitText).innerWidth();
                    $("#19cc9195583bfae1fad88e19d443be7a").remove();
                    if (textWidth > $('#' + opts.boxId).innerWidth()) {
                        $('#' + opts.boxId).html(remText + '<br />' + limitText);
                    }
                    // Show the limiter box
                    $('#' + opts.boxId).show();
                } else {
                    $('#' + opts.boxId).html(remText).show();
                }
            },

            inputlimiterKeypress = function (e) {
                var count = counter($(this).val());
                if (!opts.allowExceed && count > opts.limit) {
                    var modifierKeyPressed = e.ctrlKey || e.altKey || e.metaKey;
                    if (!modifierKeyPressed && (e.which >= 32 && e.which <= 122) && this.selectionStart === this.selectionEnd) {
                        return false;
                    }
                }
            },

            inputlimiterBlur = function () {
                var $this = $(this);
                count = counter($this.val());
                if (!opts.allowExceed && count > opts.limit) {
                    $this.val(truncater($this.val()));
                }
                if (opts.boxAttach) {
                    $('#' + opts.boxId).fadeOut('fast');
                } else if (opts.remTextHideOnBlur) {
                    var limitText = opts.limitText;
                    limitText = limitText.replace(/\%n/g, opts.limit);
                    limitText = limitText.replace(/\%s/g, (opts.limit === 1 ? '' : 's'));
                    $('#' + opts.boxId).html(limitText);
                }
            },

            counter = function (value) {
                if (opts.limitBy.toLowerCase() === "words") {
                    return (value.length > 0 ? $.trim(value).replace(/\ +(?= )/g, '').split(' ').length : 0);
                }
                var count = value.length,
                    newlines = value.match(/\n/g);
                if (newlines && opts.lineReturnCount > 1) {
                    count += newlines.length * (opts.lineReturnCount - 1);
                }
                return count;
            },

            truncater = function (value) {
                if (opts.limitBy.toLowerCase() === "words") {
                    return $.trim(value).replace(/\ +(?= )/g, '').split(' ').splice(0, opts.limit).join(' ') + ' ';
                }
                return value.substring(0, opts.limit);
            };

        $(this).each(function (i) {
            var $this = $(this);
            if ((!options || !options.limit) && opts.useMaxlength && parseInt($this.attr('maxlength')) > 0 && parseInt($this.attr('maxlength')) != opts.limit) {
                $this.inputlimiter($.extend({}, opts, {limit: parseInt($this.attr('maxlength'))}));
            } else {
                if (!opts.allowExceed && opts.useMaxlength && opts.limitBy.toLowerCase() === "characters") {
                    $this.attr('maxlength', opts.limit);
                }
                $this.unbind('.inputlimiter');
                $this.bind('keyup.inputlimiter', inputlimiterKeyup);
                $this.bind('keypress.inputlimiter', inputlimiterKeypress);
                $this.bind('blur.inputlimiter', inputlimiterBlur);
            }
        });
    };

    $.fn.inputlimiter.remtextfilter = function (opts, charsRemaining) {
        var remText = opts.remText;
        if (charsRemaining === 0 && opts.remFullText !== null) {
            remText = opts.remFullText;
        }
        remText = remText.replace(/\%n/g, charsRemaining);
        remText = remText.replace(/\%s/g, (opts.zeroPlural ? (charsRemaining === 1 ? '' : 's') : (charsRemaining <= 1 ? '' : 's')));
        return remText;
    };

    $.fn.inputlimiter.limittextfilter = function (opts) {
        var limitText = opts.limitText;
        limitText = limitText.replace(/\%n/g, opts.limit);
        limitText = limitText.replace(/\%s/g, (opts.limit <= 1 ? '' : 's'));
        return limitText;
    };

    $.fn.inputlimiter.defaults = {
        limit: 255,
        boxAttach: true,
        boxId: 'limiterBox',
        boxClass: 'limiterBox',
        remText: '%n character%s remaining.',
        remTextFilter: $.fn.inputlimiter.remtextfilter,
        remTextHideOnBlur: true,
        remFullText: null,
        limitTextShow: true,
        limitText: 'Field limited to %n character%s.',
        limitTextFilter: $.fn.inputlimiter.limittextfilter,
        zeroPlural: true,
        allowExceed: false,
        useMaxlength: true,
        limitBy: 'characters',
        lineReturnCount: 1
    };

})(jQuery);
